Arnavāz (Persian: اَرْنَواز; "Arənauuāčī" in Avestan) is one of the two daughters (or possibly sisters) of Jamshid, the mythological king of Parsia.
When Fereydun finally defeated Zahhak, he made Arnavāz and her sister repent, cleansed them of their sins and took both of them as his consorts.
Fereydun then divided the world between his sons, giving Rum (Roman) to Salm, Turan to Tur, and Iran to Iraj.
Because Iran was the best part of the world, this aroused the jealousy of Salm and Tur, leading them to kill Iraj.
However, Iraj had an (unnamed) daughter who married Pashang (not to be confused with Turanian Pashang), and had a son with him, Manuchehr, who avenged his grandfather's murder.